On Wed, Jun 20, 2018 at 3:44 PM, Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:
> On 06/20/2018 03:35 PM, Kees Cook wrote:
>> On Wed, Jun 20, 2018 at 3:16 PM, Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:
>>> On 06/20/2018 03:09 PM, Rick Edgecombe wrote:
>>>> +void *__vmalloc_node_try_addr(unsigned long addr, unsigned long size,
>>>> + gfp_t gfp_mask, pgprot_t prot, unsigned long vm_flags,
>>>> + int node, const void *caller)
>>>> +{
>>>
>>> so this isn't optional, eh? You are going to force it on people because?
>>
>> RANDOMIZE_BASE isn't optional either. :) This improves the module
>> address entropy with (what seems to be) no down-side, so yeah, I think
>> it should be non-optional. :)
>
> In what kernel tree is RANDOMIZE_BASE not optional?
Oh, sorry, I misspoke: on by default. It _is_ possible to turn it off.
But patch #2 does check for RANDOMIZE_BASE, so it should work as expected, yes?
Or did you want even this helper function to be compiled out without it?
-Kees
--
Kees Cook
Pixel Security
